Zero-forcing frequency domain equalization for DMT systems with insufficient guard interval

Tanja Karp, Martin J. Wolf, Steffen Trautmann, Norbert J. Fliege

Research output: Contribution to journalConference article

4 Scopus citations

Abstract

A generalized discrete multitone (GDMT) scheme that not only uses the guard interval but also redundancy in the frequency domain for equalization has been introduced recently [1, 2, 3]. Instead of assigning all redundancy in the time domain it allows to take advantage of unused subcarriers to remove ISI and ICI. In this paper, we calculate the signal-to-noise ratio for each subcarrier for the zero-forcing equalizer proposed in [3], From there, we derive a new adaptive loading algorithm that optimally chooses the length of the guard interval and the position of unused subcarriers. The cost function applied for the adaptive loading algorithm is the achievable data rate at a fixed error probability.

Original languageEnglish
Pages (from-to)221-224
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume4
StatePublished - 2003
Event2003 IEEE International Conference on Accoustics, Speech, and Signal Processing - Hong Kong, Hong Kong
Duration: Apr 6 2003Apr 10 2003

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